Former CIA Director and retired Gen. David Petraeus, whose military career has been overshadowed by charges that he provided classified data to his mistress, has made a deal with the Justice Department in which he will plead guilty to one count of unauthorized removal and retention of classified material.

The deal will allow Petraeus, who rose to the rank of a four-star general before becoming the director of the CIA, to avoid a trial and plead guilty to a misdemeanor. He'll also avoid a prison sentence, if a federal court agrees with the plea deal's terms.

The knock-knock joke has been a staple of American humor since the early 20th century. With its repetitive set-up and wordplay punchline, the form has been invoked — and understood — by people of all ages and sensibilities.

During her four years as secretary of state, Hillary Rodham Clinton did not use a State Department email account, opting instead to conduct official business through a personal email account that wasn't then and is not now under the government's control.

The arrangement circumvented a federal process that could have automatically preserved Clinton's email communications in government archives.

The eruption of the Villarrica volcano in southern Chile has prompted the evacuation of thousands of people, as it spewed heavy smoke into the air and lava down its slopes.

The 9,000 foot volcano hovers over the city of Pucon, home to about 22,000 people.

"It was the most amazing thing I've ever seen," Travis Armstrong, a 29-year-old Australian tourist, told The Associated Press. "I've never seen a volcano erupt and it was spewing lava and ash hundreds of meters into the air. Lightning was striking down at the volcano from the ash cloud that formed from the eruption."